package io;

import java.io.*;

/**
 * 缓冲流
 * java.io.BufferedInputStream和BufferedOutputStream
 * 缓冲流是一种高级
 */
public class BOSDemo {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("ppt.pptx");
        BufferedInputStream bis = new BufferedInputStream(fis);


        FileOutputStream fos = new FileOutputStream("ppt_cp.pptx");
        BufferedOutputStream bos = new BufferedOutputStream(fos);

        int d;
        long start = System.currentTimeMillis();
        while((d = bis.read()) != -1){
            bos.write(d);
        }
        long end = System.currentTimeMillis();

        System.out.println("复制完毕,耗时:"+(end-start)+"ms");

        bis.close();
        bos.close();


    }
    }